#!/usr/bin/env python

import os
import sys
import sqlite3 as lite
from pycomm.ab_comm.clx import Driver as ClxDriver

con = lite.connect("/mnt/usb/data.db")
PLC_IP_ADDRESS = "192.168.1.10"
PLC_TYPE = "VFD"

def getPLCIP():
    global PLC_IP_ADDRESS, PLC_TYPE
    with con:
        cur = con.cursor()
        query = "SELECT * FROM config ORDER BY dateChanged DESC LIMIT 1;"
        cur.execute(query)
        setup = cur.fetchall()
        try:
            PLC_IP_ADDRESS = setup[0][2]
            PLC_TYPE = setup[0][1]
        except:
            PLC_IP_ADDRESS = "192.168.1.10"
            PLC_TYPE = "VFD"
    return


def main(tagName):
	global PLC_IP_ADDRESS
	getPLCIP()



	c = ClxDriver()

	def readString(tag):
		read_vals = c.read_array(tag, 82)
		string = filter(lambda b: b != "",map(lambda a: chr(a[1]),read_vals))
		return "".join(string)

	if c.open(PLC_IP_ADDRESS):
		out = {}
		try:
			result =  c.read_tag([tagName])
			if result[0][2] == None:
				raise ValueError('Tag not found')
			out['status'] = "success"
			out['value'] = result[0][1]
			out['type'] = result[0][2]
		except Exception, e:
			out['status'] = "error"
			out['message'] = "Tag not found"
		return out

if __name__ == '__main__':
	res =  main(sys.argv[1])
	print res